137
people found this helpful, as of 2023
ranked #218,015 most helpful
out of 571,544,897 reviews
★☆☆☆☆
Inaccurate as it does not test under load
The problem with this battery tester is that it only checks for voltage remaining in a battery. Even a 90% used battery can show nearly full rated voltage. It is only when a load is placed on the battery that a true assessment is possible.
For example, a dead alkaline battery and a fully charged rechargable battery (NiMH full charge = 1.2 volts) both read the same low (yellow).
Look for one of the more expensive units that tests under load.
